Electronic device for adjusting frequency of reference signal used to generate rf signal

Abstract

An electronic device may include: an antenna; a radio frequency integrated circuit (RFIC) configured to: generate a first radio frequency (RF) signal in a first frequency band to be used in cellular communication by mixing a first baseband signal with a first reference signal, output the first RF signal to the antenna, receive, from the antenna, a second RF signal in a second frequency band to be used in the cellular communication, generate a second baseband signal by mixing the second RF signal with a second reference signal, and output the second baseband signal; and a processor is configured to: obtain, from the second baseband signal output by the RFIC, a control signal for establishing a communication channel between a base station and the electronic device, identify, from the control signal, a first condition for causing desense of the second RF signal, and based on the first condition being satisfied, adjust a frequency of the first reference signal.

What is claimed is: 
     
         1 . An electronic device comprising:
 an antenna;   a radio frequency integrated circuit (RFIC) configured to:   generate a first radio frequency (RF) signal in a frequency band to be used in cellular communication by mixing a first baseband signal with a first reference signal,   output the first RF signal to the antenna,   receive, from the antenna, a second RF signal in a frequency band to be used in the cellular communication,   generate a second baseband signal by mixing the second RF signal with a second reference signal, and   output the second baseband signal; and   a processor is configured to:   obtain, from the second baseband signal output by the RFIC, a control signal for establishing a communication channel between a base station and the electronic device,   identify, from the control signal, a first condition for causing desense of the second RF signal, and   based on the first condition being satisfied, adjust a frequency of the first reference signal.   
     
     
         2 . The electronic device of  claim 1 , wherein the processor is further configured to:
 obtain a reception signal strength of the second RF signal received from the base station through the antenna using the RFIC,   based on the reception signal strength, configure a power of the first RF signal to be transmitted to the base station through the antenna, and   based on the power being configured to be greater than or equal to a threshold value and the first condition being satisfied, adjust the frequency of the first reference signal.   
     
     
         3 . The electronic device of  claim 1 , wherein the processor is further configured to:
 identify an error rate of the second baseband signal received from the RFIC, and   based on the measured error rate being identified to be equal to or greater than a threshold value and the first condition being satisfied, adjust the frequency of the first reference signal.   
     
     
         4 . The electronic device of  claim 3 , wherein a value capable of being configured as the frequency of the first reference signal is a default value, a first value that is greater than the default value, or a second value that is smaller than the default value, and
 wherein the processor is further configured to:   based on the measured error rate being identified to be equal to or greater than a threshold value and the first condition being satisfied, change the frequency of the first reference signal from the default value to one of the first value and the second value, and   based on the measured error rate being identified to be equal to or greater than the threshold value in the state in which the frequency of the first reference signal is configured as one of the first value and the second value, change the frequency of the first reference signal to a remaining one of the first value and the second value.   
     
     
         5 . The electronic device of  claim 1 , wherein the first condition comprises:
 a number of a transmission channel;   a bandwidth of the transmission channel;   the frequency band of the first RF signal to be transmitted to the base station through the antenna in the transmission channel; and   the frequency band of the second RF signal received from the base station in a reception channel.   
     
     
         6 . The electronic device of  claim 1 , further comprising a wireless communication circuit configured to support wireless communication other than the cellular communication,
 wherein the processor is further configured to:   identify that a second condition for causing desense of a third RF signal received by the wireless communication circuit from an outside is included in the control signal, and   based on the second condition being included in the control signal, adjust the frequency of the first reference signal.   
     
     
         7 . The electronic device of  claim 6 , wherein the RFIC is further configured to generate the first RF signal in an uplink band having a center frequency of about 2.4 GHz, and
 wherein the wireless communication circuit comprises a Wi-Fi communication circuit supporting wireless communication in a band of about 2.4 GHz.   
     
     
         8 . The electronic device of  claim 6 , wherein the RFIC is further configured to generate the first RF signal in an uplink band having a center frequency of about 725.5 MHz, and
 wherein the wireless communication circuit comprises a Global Positioning System (GPS) reception circuit configured to receive a GPS signal in a band of about 1.5 GHz.   
     
     
         9 . The electronic device of  claim 6 , wherein the second condition comprises:
 a number of transmission channel;   a bandwidth of the transmission channel; and   the frequency band of the first RF signal to be transmitted to the base station through the antenna in the transmission channel.   
     
     
         10 . The electronic device of  claim 6 , wherein the processor is further configured to:
 obtain information about a quality of the third RF signal received by the wireless communication circuit, and   based on the quality being identified to be equal to or less than a reference value and the second condition being included in the control signal, adjust the frequency of the first reference signal.   
     
     
         11 . The electronic device of  claim 6 , wherein the processor is further configured to:
 obtain a reception signal strength of the second RF signal received from the base station through the antenna using the RFIC,   based on the reception signal strength, configure power of the first RF signal to be transmitted to the base station through the antenna, and   based on the power being configured to be greater than or equal to a threshold value and the second condition being included in the control signal, adjust the frequency of the first reference signal.   
     
     
         12 . The electronic device of  claim 1 , wherein the processor comprises a communication processor constituting a cellular communication circuit together with the RFIC. 
     
     
         13 . The electronic device of  claim 1 , wherein the RFIC comprises a filter configured to filter an analog signal in a specified first baseband from an analog signal received from the processor and output the filtered analog signal, and
 wherein the processor is further configured to adjust the first baseband to pass through the filter by a value by which the frequency of the first reference signal is adjusted.   
     
     
         14 . An electronic device comprising:
 a plurality of antennas;   a radio frequency integrated circuit (RFIC) configured to:   generate a first radio frequency (RF) signal in a frequency band to be used in cellular communication by mixing a first baseband signal with a first reference signal,   output the first RF signal to a first antenna among the plurality of antennas,   receive, from the first antenna, a second RF signal in a frequency band to be used in the cellular communication,   generate a second baseband signal by mixing the second RF signal with a second reference signal, and   output the second baseband signal;   a wireless communication circuit configured to support wireless communication other than the cellular communication; and   a processor is configured to:   obtain information about a quality of a third RF signal received by the wireless communication circuit through a second antenna among the plurality of antennas,   based on the quality being identified to be less than or equal to a reference value, obtain, from the second baseband signal received from the RFIC, a control signal for establishing a communication channel between a base station and the electronic device,   identify, from the control signal, a condition for causing desense of the third RF signal received by the wireless communication circuit through the second antenna, and   based on the condition being satisfied, adjust a frequency of the first reference signal.   
     
     
         15 . The electronic device of  claim 14 , wherein the RFIC is further configured to generate the first RF signal in an uplink band having a center frequency of about 2.4 GHz, and
 wherein the wireless communication circuit comprises a Wi-Fi communication circuit supporting wireless communication in a band of about 2.4 GHz.   
     
     
         16 . The electronic device of  claim 14 , wherein the RFIC is further configured to generate the first RF signal in an uplink band having a center frequency of about 725.5 MHz, and
 wherein the wireless communication circuit comprises a Global Positioning System (GPS) reception circuit configured to receive a GPS signal in a band of about 1.5 GHz.   
     
     
         17 . The electronic device of  claim 14 , wherein the condition comprises:
 a number of transmission channel;   a bandwidth of the transmission channel; and   the first frequency band of the first RF signal to be transmitted to the base station through the first antenna in the transmission channel.   
     
     
         18 . A method of operating an electronic device, the method comprising:
 obtaining a control signal for establishing a communication channel between a base station and the electronic device from a radio frequency integrated circuit (RFIC) of the electronic device;   identifying, from the control signal, a condition for causing desense of a radio frequency (RF) signal received by the RFIC from the base station; and   based on the condition being satisfied, adjusting a frequency of a reference signal,   wherein the reference signal is a signal used to generate an RF signal to be transmitted by the RFIC to the base station.   
     
     
         19 . The method of  claim 18 , further comprising:
 obtaining a reception signal strength of the RF signal received from the base station through an antenna using the RFIC;   based on the reception signal strength, configuring power of the RF signal to be transmitted to the base station through the antenna,   wherein the adjusting the frequency of the reference signal comprises, based on the power being configured to be greater than or equal to a threshold value and the condition being satisfied, adjusting the frequency of the reference signal.   
     
     
         20 . The method of  claim 18 , further comprising measuring an error rate of a baseband signal obtained by processing the RF signal received from the base station through an antenna in the RFIC,
 wherein the adjusting the frequency of the reference signal comprises, based on the measured error rate being identified to be equal to or greater than a threshold value and the condition being satisfied, adjusting the frequency of the reference signal.